When the Number of Catalogs Being Sent to Individual Carrier

When the number of catalogs being sent to individual carrier routes is small,

A) the database can add special incentives such as product samples.
B) the database can add names to qualify for U.S.postal discounts.
C) the database is less effective since the customer base is too small to segment.
D) the database is more effective since the customer base does not have to be segmented.
E) the database can generate generic catalogs to use instead of targeted ones.